COMPATIBILITY AND LCST BEHAVIOR IN POLY(VINYLIDENE FLUORIDE-CO-HEXAFLUOROACETONE)/POLY(METHYL METHACRYLATE) BLENDS

被引：3

作者：

KOBAYASHI, S

TASAKA, S

MIYATA, S

机构：

[1] Tokyo Univ of Agriculture and, Technology, Koganei, Jpn, Tokyo Univ of Agriculture and Technology, Koganei, Jpn

来源：

KOBUNSHI RONBUNSHU | 1987年 / 44卷 / 09期

关键词：

COPOLYMERS - FLUORINE CONTAINING POLYMERS - Phase Diagrams - THERMODYNAMIC PROPERTIES;

D O I：

10.1295/koron.44.695

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Compatibility in poly(vinylidene fluoride-co-hexafluoroacetone) left bracket P(VDF-HFA) right bracket /poly(methyl methacrylate) (PMMA) blends was investigated experimentally. Glass transition temperature and refractive index of blends depend on the volume fraction. Lower critical solution temperature (LCST) type phase diagrams were obtained from transmittance-temperature measurements. Transmittance changes of the critical concentration blends were one step decreasing by spinodal decomposition; the changes for other blends were two step decreasing, by binodal and spinodal decompositions. LCST's were 245 degree C and 233 degree C when the molecular weight of PMMA was 4 multiplied by 10**4 and 12 multiplied by 10**4, respectively. The LCST was about 330 degree C in PVDF/PMMA system, but it was found that copolymerization of HFA with VDF caused the LCST to shift to lower temperature.

引用

页码：695 / 699

页数：5